单选题
Although salt is now seen as harmful to health, it has been used for centuries as method of ______ foods.
A、
maintaining
B、
preserving
C、
manufacturing
D、
reserving
【正确答案】
B
【答案解析】
preserve“保存”maintain“保养；维持；维修”manufacture“生产制作”；reserve“保留”。
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